Java 如何在android中使用DOM或SAX解析器从XML中读取子节点
这是我的XMLJava 如何在android中使用DOM或SAX解析器从XML中读取子节点,java,android,xml-parsing,saxparser,domparser,Java,Android,Xml Parsing,Saxparser,Domparser,这是我的XML <Operations> <Operation Name="OperationName1">Entity details1</Operation> <Operation Name="OperationName2">Entity details2</Operation> <Operation Name="OperationName3">Entity details3</Operation> <
<Operations>
<Operation Name="OperationName1">Entity details1</Operation>
<Operation Name="OperationName2">Entity details2</Operation>
<Operation Name="OperationName3">Entity details3</Operation>
<Operation Name="OperationName4">Entity details4</Operation>
</Operations>
试试这个
String elemName;
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
elemName=qName;
}
public void characters(char[] ch, int start, int length)
throws SAXException {
if(elemName.equals("OperationName1")) {
String OperationName1Text=new String(ch);
}
}
public void endElement(String uri, String localName, String qName)
throws SAXException {
}
请看下面的代码,这里我获取了一个子节点“description”
URL;
试一试{
url=新url(url);
HttpURLConnection conn=(HttpURLConnection)url.openConnection();
if((conn.getResponseCode()==HttpURLConnection.HTTP_OK)){
DocumentBuilderFactory dbf=DocumentBuilderFactory
.newInstance();
DocumentBuilder db=dbf.newDocumentBuilder();
文件文件;
doc=db.parse(url.openStream());
doc.getDocumentElement().normalize();
nodelistitemlst=doc.getElementsByTagName(“项”);
nl=doc.getElementsByTagName(键头);
Description=新字符串[itemLst.getLength()];/。。。。。。。。
对于(int i=0;i
您可以尝试DOM和Transformer
Transformer tx = TransformerFactory.newInstance().newTransformer();
tx.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new File("1.xml"));
NodeList list = doc.getElementsByTagName("Operation");
for (int i = 0; i < list.getLength(); i++) {
DOMSource src = new DOMSource(list.item(i));
StringWriter sr = new StringWriter();
Result res = new StreamResult(sr);
tx.transform(src, res);
System.out.println(sr);
}
Transformer tx=TransformerFactory.newInstance().newTransformer();
tx.setOutputProperty(OutputKeys.OMIT_XML_声明,“是”);
Document doc=DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(新文件(“1.xml”);
NodeList list=doc.getElementsByTagName(“操作”);
对于(int i=0;i
输出
<Operation Name="OperationName1">Entity details1</Operation>
<Operation Name="OperationName2">Entity details2</Operation>
<Operation Name="OperationName3">Entity details3</Operation>
<Operation Name="OperationName4">Entity details4</Operation>
实体详细信息1
实体详细信息2
实体详细信息3
实体详细信息4
对不起,这将只返回“Entity Details 2”之类的文本,还是我错了?@Giri yes characters方法只返回它。其他方法(如start element)将给出元素名称及其属性。您还想获取什么?Hanks,正如我在帖子中解释的,我需要将子节点的整个xml存储在字符串变量中。我们可以像Evgeniy Dorofev说的那样创造它。但是我有非常复杂的xml。所以我尝试使用一些默认方法。有可能吗?@Giri很抱歉,您不能使用sax将整个chlild节点保持为字符串。因为sax是一个从xml的顶部到底部移动的解析器,因此它会相应地触发事件。是否有任何默认方法可以为子节点提供xml?因为如果我有非常大的xml,并且每个子节点都有不同的节点名和属性,那么这将变得更加复杂。查看一下新版本Corry,但它也只返回节点内的文本。
String elemName;
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
elemName=qName;
}
public void characters(char[] ch, int start, int length)
throws SAXException {
if(elemName.equals("OperationName1")) {
String OperationName1Text=new String(ch);
}
}
public void endElement(String uri, String localName, String qName)
throws SAXException {
}
URL url;
try {
url = new URL(urls);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
if ((conn.getResponseCode() == HttpURLConnection.HTTP_OK)) {
DocumentBuilderFactory dbf = DocumentBuilderFactory
.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc;
doc = db.parse(url.openStream());
doc.getDocumentElement().normalize();
NodeList itemLst = doc.getElementsByTagName("item");
nl = doc.getElementsByTagName(KEY_HEAD);
Description = new String[itemLst.getLength()];// ........
for (int i = 0; i < itemLst.getLength(); i++) {
Node item = itemLst.item(i);
if (item.getNodeType() == Node.ELEMENT_NODE) {
Element ielem = (Element) item;
NodeList description = ielem
.getElementsByTagName("description");
Desc[i] = description.item(0).getChildNodes().item(0)
.getNodeValue();
}
}
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (DOMException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Transformer tx = TransformerFactory.newInstance().newTransformer();
tx.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new File("1.xml"));
NodeList list = doc.getElementsByTagName("Operation");
for (int i = 0; i < list.getLength(); i++) {
DOMSource src = new DOMSource(list.item(i));
StringWriter sr = new StringWriter();
Result res = new StreamResult(sr);
tx.transform(src, res);
System.out.println(sr);
}
<Operation Name="OperationName1">Entity details1</Operation>
<Operation Name="OperationName2">Entity details2</Operation>
<Operation Name="OperationName3">Entity details3</Operation>
<Operation Name="OperationName4">Entity details4</Operation>